Home/ Questions/Q 6766237
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-26T14:48:21+00:00

I get strange errors when trying to deploy a Flask app (v0.8). I’m using

  • 0

I get strange errors when trying to deploy a Flask app (v0.8). I’m using apache’s mod_wsgi, as suggested in the docs (almost to the letter). What’s strange is that on some requests (simply accessing / via browser), the application loads fine, but very often I get a resource load errors (can’t fetch some css or image), and the error log shows something like Premature end of script headers: myapp.wsgi. Sometimes apache crashes with Internal Server Error. I’m trying to chase the problem but could not figure out what’s the cause. My wsgi file looks simple:

from myapp import app as application

Any clues where to start looking?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    If you are getting Premature end of script headers, you are using daemon mode and the daemon process is crashing with a seg fault or similar.

    Make sure you aren’t still loading mod_python.

    Also try setting:

    WSGIApplicationGroup %{GLOBAL}

    to work around issues with Python C extension modules which aren’t safe for sub interpreters.

    See:

    http://code.google.com/p/modwsgi/wiki/ApplicationIssues

    and look for various reasons for crashes listed.

    • 0